CN116282848A - Curvature regulating and controlling method for optical lens array lens forming process - Google Patents
Curvature regulating and controlling method for optical lens array lens forming process Download PDFInfo
- Publication number
- CN116282848A CN116282848A CN202310206048.7A CN202310206048A CN116282848A CN 116282848 A CN116282848 A CN 116282848A CN 202310206048 A CN202310206048 A CN 202310206048A CN 116282848 A CN116282848 A CN 116282848A
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- glass
- lens array
- optical lens
- forming process
- die
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- 238000000034 method Methods 0.000 title claims abstract description 63
- 230000008569 process Effects 0.000 title claims abstract description 39
- 230000003287 optical effect Effects 0.000 title claims abstract description 35
- 230000001276 controlling effect Effects 0.000 title claims abstract description 12
- 230000001105 regulatory effect Effects 0.000 title claims abstract description 8
- 239000011521 glass Substances 0.000 claims abstract description 53
- 238000000465 moulding Methods 0.000 claims abstract description 32
- 238000001816 cooling Methods 0.000 claims abstract description 9
- 239000002086 nanomaterial Substances 0.000 claims abstract description 8
- 238000000137 annealing Methods 0.000 claims abstract description 5
- 239000000156 glass melt Substances 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 7
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- 238000009740 moulding (composite fabrication) Methods 0.000 claims description 2
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 claims description 2
- 238000003825 pressing Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 238000007723 die pressing method Methods 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 description 8
- 238000000227 grinding Methods 0.000 description 8
- 239000002245 particle Substances 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 2
- 229910003460 diamond Inorganic materials 0.000 description 2
- 239000010432 diamond Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- -1 cemented carbide Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000007496 glass forming Methods 0.000 description 1
- 239000002241 glass-ceramic Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000005304 optical glass Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B11/00—Pressing molten glass or performed glass reheated to equivalent low viscosity without blowing
- C03B11/06—Construction of plunger or mould
- C03B11/08—Construction of plunger or mould for making solid articles, e.g. lenses
- C03B11/082—Construction of plunger or mould for making solid articles, e.g. lenses having profiled, patterned or microstructured surfaces
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
- Y02P40/57—Improving the yield, e-g- reduction of reject rates
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
Abstract
The invention discloses a curvature regulating and controlling method in the process of forming an optical lens array lens, which comprises the following steps: s1, placing reaction glass on a lower die, and performing die pressing on the reaction glass through an upper die and the lower die, wherein the lower surface of the upper die is provided with a plurality of grooves distributed in an array, and the reaction glass is melted and pressed into each groove in the die pressing process and chemically reacts with the inner surface of each groove to generate a hydrophilic micro-nano structure on the inner surface of each groove; s2, cooling the reaction glass and demolding; s3, placing the molded glass on a lower die, and molding the molded glass through an upper die and the lower die, wherein the molded glass is melted in the molding process and pressed into each groove, and the glass melt does not contact the inner bottom surface of each groove; and S4, annealing, cooling, demolding and forming to obtain the optical lens array lens. The invention can improve the processing efficiency and the surface quality of the optical lens array lens, reduce the manufacturing cost and realize the curvature regulation in the forming process of the optical lens array lens.
Description
Technical Field
The invention relates to the technical field of micro lens preparation, in particular to a curvature regulating and controlling method in the lens forming process of an optical lens array.
Background
In recent years, the optical microlens array lens controls the characteristics of light reflection, refraction, diffraction and the like, and achieves the functions of complex imaging, quick positioning, ranging, speed measurement, navigation, beam guidance, optical communication and the like in the fields of civil use and national defense.
Common optical microlens array lens processing methods include precision grinding processing technology, micro laser processing technology, compression molding technology and the like. The precision grinding technology is a processing method for controlling the cutting depth of single diamond abrasive particles in grinding to be lower than the brittle plastic transformation quantity of a processed material, and the processing precision of precision grinding can reach or be higher than 0.1 mu m, and the surface roughness is lower than 25nm. The precise grinding processing is particularly suitable for processing superhard materials such as cemented carbide, glass ceramic and the like. The precision grinding technology can effectively ensure the surface shape precision of the microstructure surface, but larger errors are easy to occur at the edges and the inner corners of the microstructure obtained by processing, and the sharp part of the diamond grinding wheel is extremely easy to wear in the processing process.
The micro laser processing technology has the advantages of high brightness, strong directivity, good monochromaticity, good coherence and the like, the range of processable materials is wider, and when the optical micro-structure array is processed by laser, the micro-structure array has a single period size of micrometer or smaller, the minimum energy facula of the laser is limited, and the energy distribution in the facula is uneven. Thus, it is difficult to obtain a highly uniform optical microstructure array by controlling laser energy. In addition, the laser processing has low processing efficiency and is not suitable for mass production.
The mould pressing technology is applied to a mature state at present, a certain pressure is applied at a high temperature to copy the shape of the micro-nano lens array on the surface of the mould to the surface of glass softened by heating, and the micro-nano lens array is processed on the surface of the optical glass material through annealing, cooling and solidification. Compared with the traditional machining technologies such as cutting and grinding, the method has the characteristics of high forming precision, high efficiency, good consistency, low machining cost and the like, is suitable for mass production and manufacturing, reduces the production cost and is considered as one of the most effective methods for manufacturing the optical micro-nano lens array lenses. However, the method has the advantages that the curvature of the formed lens depends on the curvature of the lens array structure of the mold, and the molds with different curvatures are required to be processed to manufacture the lenses with different curvatures, so that the autonomous and rapid controllable adjustment cannot be realized. And the surface quality and the morphology precision of the molded lens cannot reach or even exceed the precision of the mold.
Disclosure of Invention
The invention aims to provide a curvature regulating and controlling method for an optical lens array lens forming process, which solves the problems in the prior art, can improve the surface quality of the optical lens array lens and realize curvature regulation and control for the optical lens array lens forming process.
In order to achieve the above object, the present invention provides the following solutions:
the invention provides a curvature regulating and controlling method in the process of forming an optical lens array lens, which comprises the following steps:
s1: the method comprises the steps that reaction glass is placed on a lower die, the reaction glass is molded through an upper die and the lower die, the lower surface of the upper die is provided with a plurality of grooves distributed in an array mode, and the reaction glass is melted and pressed into the grooves in the molding process and chemically reacts with the inner surfaces of the grooves, so that hydrophilic micro-nano structures are formed on the inner surfaces of the grooves;
s2: cooling the reaction glass and then demoulding;
s3: placing the molded glass on the lower die, and molding the molded glass through the upper die and the lower die, wherein the molded glass is melted and pressed into the grooves in the molding process, and the glass melt does not contact the inner bottom surfaces of the grooves;
s4: and (5) demoulding after annealing and cooling, and forming to obtain the optical lens array lens.
Preferably, the reaction glass is a lead-containing nitre material, and the upper die is a nickel-containing metal die.
Preferably, the diameter of the groove is not more than 1mm.
Preferably, in the step S1, the temperature of the molding process is 30-40 ℃ above the temperature point of Ts of the reaction glass, and the pressure is 1-10 MPa.
Preferably, in step S1, the hydrophilicity degree of the hydrophilic micro-nano structure on the inner surface of the groove is controlled by controlling the molding time.
Preferably, in step S3, the temperature of the molding process is 500 ℃ and the pressure is 10MPa.
Compared with the prior art, the invention has the following technical effects:
the invention provides a curvature regulation and control method in the optical lens array lens forming process, which can be used for preparing moulds with different hydrophilic characteristics by setting the molding time of reaction glass and a mould, wherein after the hydrophilicity of the inner surface of a groove in an upper mould is changed, the contact angle between the molded glass and the inner wall is changed when the molded glass is molded, so that the curvature is changed, and the curvature regulation and control in the optical lens array lens forming process is realized; during the molding process, the curved surface part of the lens is not contacted with the mold, so that the surface quality is greatly ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a method of curvature adjustment in an optical lens array lens forming process according to an embodiment;
in the figure: 1-reaction glass, 2-lower die, 3-upper die, 4-groove and 5-molding glass.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention aims to provide a curvature regulating and controlling method for an optical lens array lens forming process, which solves the problems existing in the prior art, can improve the surface quality of the optical lens array lens and realize curvature regulation and control for the optical lens array lens forming process.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
As shown in fig. 1, the present embodiment provides a curvature adjusting method in an optical lens array lens forming process, which includes the following steps:
s1: the reaction glass 1 is placed on a lower die 2, the reaction glass 1 is molded through an upper die 3 and the lower die 2, the lower surface of the upper die 3 is provided with a plurality of grooves 4 distributed in an array, and the reaction glass 1 is melted and pressed into each groove 4 in the molding process and chemically reacts with the inner surface of each groove 4, so that the inner surface of each groove 4 generates a hydrophilic micro-nano structure;
s2: cooling the reaction glass 1 and demolding;
s3: placing the molding glass 5 on the lower die 2, and molding the molding glass 5 through the upper die 3 and the lower die 2, wherein the molding glass 5 is melted and pressed into each groove 4 in the molding process, and the glass melt does not contact the inner bottom surface of each groove 4;
s4: and (5) annealing, cooling, demolding and forming to obtain the optical lens array lens.
Before the molding of the reaction glass 1, corresponding grooves 4 are machined in the upper mold 3 according to the desired product specifications. The mold with different hydrophilic characteristics can be prepared by setting the molding time of the reaction glass 1 and the mold, after the hydrophilicity of the inner surface of the groove 4 in the upper mold 3 is changed, the contact angle between the molded glass 5 and the inner wall is changed when the molded glass 5 is molded, so that the curvature is changed, and the curvature regulation and control of the optical lens array lens forming process is realized; during the molding process, the curved surface part of the lens is not contacted with the mold, so that the surface quality is greatly ensured. The die-pressing forming method is adopted, and the die-pressing forming method has the characteristics of high forming efficiency, good consistency, low processing cost and the like, and is suitable for mass production. When the molding glass 5 such as D-ZK2N glass and the like is molded, the glass is specially developed for a glass molding process, is chemically inert in a high-temperature environment and cannot react with the mold. After the molding of the molded glass 5 is completed, the glass is subjected to cold shrinkage and is automatically demolded, so that the optical micro-nano lens array is formed.
In this embodiment, the reaction glass 1 is a lead-containing nitrate material, such as ZF52, and the like, and the glass has high chemical activity at high temperature, and the upper mold 3 is a nickel-containing metal mold. Under the high-temperature and high-pressure environment, ni on the mold replaces divalent lead in the glass to form lead particles and the lead particles are attached to the surface of the mold, so that a hydrophilic micro-nano structure is formed on the surface of the mold.
In this embodiment, the diameter of the groove 4 does not exceed 1mm. There is generally a significant capillary phenomenon in the pipe having an inner diameter of 1mm, so that the inner diameter of the groove 4 on the die should not exceed 1mm.
In this example, in step S1, the temperature of the molding process is 30 to 40℃above the temperature point of Ts of the reaction glass 1, preferably 35℃and the pressure is 1 to 10MPa, preferably 10MPa.
In this embodiment, in step S1, the hydrophilicity of the hydrophilic micro-nano structure on the inner surface of the groove 4 is controlled by controlling the molding time. The longer the molding time, the deeper the reaction, and the more pronounced the hydrophilicity enhancement of the inner surface of the groove 4. After the hydrophilicity of the inner surface of the groove 4 is changed, the contact angle between the glass and the inner wall is changed, so that the curvature is changed. In one embodiment, the contact angle is reduced from 90 ° to 60 ° to change the glass forming curvature.
In this embodiment, in step S3, the molding process is performed at a temperature of 488 to 512 ℃, preferably 500 ℃, and a pressure of 1 to 10MPa, preferably 10MPa.
The principles and embodiments of the present invention have been described in detail with reference to specific examples, which are provided to facilitate understanding of the method and core ideas of the present invention; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the invention.
Claims (6)
1. A method for curvature adjustment and control in a lens forming process of an optical lens array, comprising the steps of:
s1: the method comprises the steps that reaction glass is placed on a lower die, the reaction glass is molded through an upper die and the lower die, the lower surface of the upper die is provided with a plurality of grooves distributed in an array mode, and the reaction glass is melted and pressed into the grooves in the molding process and chemically reacts with the inner surfaces of the grooves, so that hydrophilic micro-nano structures are formed on the inner surfaces of the grooves;
s2: cooling the reaction glass and then demoulding;
s3: placing the molded glass on the lower die, and molding the molded glass through the upper die and the lower die, wherein the molded glass is melted and pressed into the grooves in the molding process, and the glass melt does not contact the inner bottom surfaces of the grooves;
s4: and (5) demoulding after annealing and cooling, and forming to obtain the optical lens array lens.
2. The method of curvature adjustment and control for an optical lens array lens forming process according to claim 1, wherein: the reaction glass is made of lead-containing nitre material, and the upper die is a nickel-containing metal die.
3. The method of curvature adjustment and control for an optical lens array lens forming process according to claim 1, wherein: the diameter of the groove is not more than 1mm.
4. The method of curvature adjustment and control for an optical lens array lens forming process according to claim 1, wherein: in the step S1, the temperature of the mould pressing process is 30-40 ℃ above the temperature point of Ts of the reaction glass, and the pressure is 1-10 MPa.
5. The method of curvature adjustment and control for an optical lens array lens forming process according to claim 1, wherein: in the step S1, the hydrophilicity degree of the hydrophilic micro-nano structure on the inner surface of the groove is regulated and controlled by controlling the molding time.
6. The method of curvature adjustment and control for an optical lens array lens forming process according to claim 1, wherein: in step S3, the temperature of the molding process is 500 ℃ and the pressure is 10MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310206048.7A CN116282848A (en) | 2023-02-27 | 2023-02-27 | Curvature regulating and controlling method for optical lens array lens forming process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310206048.7A CN116282848A (en) | 2023-02-27 | 2023-02-27 | Curvature regulating and controlling method for optical lens array lens forming process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116282848A true CN116282848A (en) | 2023-06-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310206048.7A Pending CN116282848A (en) | 2023-02-27 | 2023-02-27 | Curvature regulating and controlling method for optical lens array lens forming process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116282848A (en) |
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2023
- 2023-02-27 CN CN202310206048.7A patent/CN116282848A/en active Pending
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